172.56.38.0/23

AS21928 · T-Mobile USA, Inc.

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Summary

Country	United States
Domain	t-mobile.com
ASN	AS21928
Parent Range	172.32.0.0/11
Registry	ARIN
ID	TMO9

WHOIS Details

NetHandle:      NET-172-32-0-0-1
OrgID:          TMOBI
Parent:         NET-172-0-0-0-0
NetName:        TMO9
NetRange:       172.32.0.0 - 172.63.255.255
NetType:        allocation
Comment:        Geofeed https://raw.githubusercontent.com/tmobile/tmus-geofeed/main/tmus-geo-ip.txt
RegDate:        2012-09-18
Updated:        2020-11-18
Source:         ARIN


OrgID:          TMOBI
OrgName:        T-Mobile USA, Inc.
CanAllocate:    
Street:         12920 SE 38th Street
City:           Bellevue
State/Prov:     WA
Country:        US
PostalCode:     98006
RegDate:        2003-01-02
Updated:        2017-01-28
OrgAdminHandle: DNSAD11-ARIN
OrgTechHandle:  DNSAD11-ARIN
OrgAbuseHandle: ABUSE4857-ARIN
Source:         ARIN


POCHandle:      DNSAD11-ARIN
IsRole:         Y
LastName:       DNS Administrators
FirstName:      
Street:         12920 SE 38th Street
City:           Bellevue
State/Prov:     WA
Country:        US
PostalCode:     98027
RegDate:        2003-01-02
Updated:        2026-01-08
OfficePhone:    +1-888-662-4662
Mailbox:        ARINtechcontact@t-mobile.com
Source:         ARIN


POCHandle:      ABUSE4857-ARIN
IsRole:         Y
LastName:       abuse
FirstName:      
Street:         12920 SE 38th Street
City:           Bellevue
State/Prov:     WA
Country:        US
PostalCode:     98006
RegDate:        2014-09-23
Updated:        2025-05-27
OfficePhone:    +1-888-662-4662
Mailbox:        abuse@t-mobile.com
Source:         ARIN

Overlapping Ranges

BGP prefixes that contain 172.56.38.0/23

Range	ASN	Company	Num of IPs
172.32.0.0/11	AS21928	T-Mobile USA, Inc.	2,097,152

Nearby Ranges

BGP prefixes that overlap with 172.56.0.0/16

Range	ASN	Company	Num of IPs
172.32.0.0/11	AS21928	T-Mobile USA, Inc.	2,097,152

Hosted domains

There are no domains currently hosted on this ASN.

Hosted domains API

Our Hosted Domains API, or Reverse IP API returns a full list of domains that are hosted on a single IP address.

Useful for Cybersecurity

Read more

Pingable IPs

No IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

Other Pingable IPs

Below is a random selection of 25 IPs that replied to an ICMP ping during our most recent internet scan.

IP Address	ASN	Details
5.30.229.135	AS15802 Emirates Integrated Telecommunications Company PJSC	`5.88ms` from Abu Dhabi, AE
145.38.16.135	AS1103 SURF B.V.	`0.53ms` from Amsterdam, NL
172.206.192.199	AS8075 Microsoft Corporation	`0.62ms` from Ashburn, US
51.79.21.183	AS16276 OVH SAS	`0.07ms` from Beauharnois, CA
23.213.100.183	AS16625 Akamai Technologies, Inc.	`0.23ms` from Bengaluru, IN
34.140.41.39	AS396982 Google LLC	`0.14ms` from Brussels, BE
181.101.178.119	AS7303 Telecom Argentina S.A.	`7.09ms` from Buenos Aires, AR
75.211.240.183	AS6167 Verizon Business	`13.60ms` from Chicago, US
68.22.111.23	AS7018 AT&T Enterprises, LLC	`1.91ms` from Chicago, US
34.242.218.55	AS16509 Amazon.com, Inc.	`0.48ms` from Dublin, IE
111.230.143.55	AS45090 Shenzhen Tencent Computer Systems Company Limited	`1.97ms` from Guangzhou, CN
183.145.69.7	AS4134 CHINANET-BACKBONE	`10.39ms` from Hangzhou, CN
2.61.112.119	AS12389 PJSC Rostelecom	`8.53ms` from Krasnoyarsk, RU
50.83.197.199	AS30036 Mediacom Communications Corp	`9.89ms` from Minneapolis, US
187.67.197.183	AS28573 Claro NXT Telecomunicacoes Ltda	`4.41ms` from Rio de Janeiro, BR
201.137.47.39	AS8151 UNINET	`3.53ms` from Santiago de Queretaro, MX
46.229.200.39	AS20911 Net-Surf.net Ltd.	`4.84ms` from Sofia, BG
124.211.226.183	AS2516 KDDI CORPORATION	`3.28ms` from Tokyo, JP
85.206.27.231	AS8764 Telia Lietuva, AB	`0.70ms` from Vilnius, LT
80.48.69.247	AS5617 Orange Polska Spolka Akcyjna	`6.09ms` from Warsaw, PL
150.252.169.183	AS19331 Twin Lakes Telephone Cooperative Corporation	`11.22ms` from Atlanta, US
107.205.54.103	AS7018 AT&T Enterprises, LLC	`2.58ms` from Atlanta, US
135.232.48.119	AS8075 Microsoft Corporation	`0.23ms` from Boydton, US
101.188.200.135	AS1221 Telstra Limited	`2.24ms` from Brisbane, AU
220.81.214.199	AS4766 Korea Telecom	`4.79ms` from Incheon, KR

Traceroute

Below is a recent traceroute taken from the IPinfo ProbeNet to an IP in this range. Learn more.

traceroute -a -n -q1 -f4 -m7 172.56.38.63

traceroute to 172.56.38.63 (172.56.38.63): 7 hops max, 52 byte packets

4 [AS21928] 100.199.0.93 0.072 ms

5 *

6 *

7 *

Measurement taken from

IPinfo ProbeNet in Tieling, CN

On March 22nd 2026

What are IP address ranges?

IP address ranges, or netblocks, are groups of related IP addresses. They are usually represented as a base IP address, followed by a slash, and then a netmask which represents how many IP addresses are contained within the netblock. This format is known as CIDR. You'll also sometimes see netblocks given as a start ip address, and an end ip address, or an ip address range.

Traffic works its way around the internet based on the routing table, which contains a list of networks and their associated netblocks.

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